Agreed with Rahul,
For ISCA - Manish Velechha is good
Another important is What ever the book you prepared the result based on our presentation of answers in examination.
Whlie preparation read entire topics but study selective topics.
Present ansewers in point wise format not in paragraph format.
Concentrate more on ACCOUNTING STANDRADS,STANDARDS ON AUDITING AND PROFESSIONAL ETICHES which covers around 30 to 40 marks in Auditing.Don'T quote worng Standard Numbers,clause numbers,schedule numbers.
For ISCA - SDLC,RISK ANALYSIS,ERP,TESTING,CONTROL
Don't loose patience while preparing as well as writing exam.
All The Best!!!!!!